Scholars@Duke
Christopher Walter

Christopher Walter

Professor of Physics
Physics
chris.walter@duke.edu
Box 90305, Durham, NC 27708-0305
120 Science Drive, Office 271, Durham, NC 27708

Selected Publications

Simulating Continuum-based Redshift Measurement in the Roman’s High Latitude Spectroscopic Survey

Journal Article Astronomical Journal · June 2, 2025 We investigate the capability of the Nancy Grace Roman Space Telescope’s (Roman) Wide-Field Instrument G150 slitless grism to detect red, quiescent galaxies based on the current reference survey. We simulate dispersed images for Roman reference High-Latitu ... Full text Cite

First Joint Oscillation Analysis of Super-Kamiokande Atmospheric and T2K Accelerator Neutrino Data.

Journal Article Physical review letters · January 2025 The Super-Kamiokande and T2K Collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interaction model for events overlapping in neutrino energy and correlated detector s ... Full text Cite

Search for proton decay via p →e+η and p →μ+η with a 0.37 Mton-year exposure of Super-Kamiokande

Journal Article Physical Review D · December 1, 2024 A search for proton decay into e+/μ+ and a η meson has been performed using data from a 0.373 Mton·year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear η interaction ... Full text Cite

Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector

Journal Article Physical Review D · October 15, 2024 We present the results of the charge ratio (R) and polarization (P0μ) measurements using decay electron events collected between September 2008 and June 2022 with the Super-Kamiokande detector. Because of its underground location and long operation, we are ... Full text Cite

Combined Pre-supernova Alert System with KamLAND and Super-Kamiokande

Journal Article Astrophysical Journal · October 1, 2024 Preceding a core-collapse supernova (CCSN), various processes produce an increasing amount of neutrinos of all flavors characterized by mounting energies from the interior of massive stars. Among them, the electron antineutrinos are potentially detectable ... Full text Cite

Development of a Data Overflow Protection System for Super-Kamiokande to Maximize Data from Nearby Supernovae

Journal Article Progress of Theoretical and Experimental Physics · October 1, 2024 Neutrinos from very nearby supernovae, such as Betelgeuse, are expected to generate more than ten million events over 10 s in Super-Kamokande (SK). At such large event rates, the buffers of the SK analog-to-digital conversion board (QBEE) will overflow, ca ... Full text Cite

Time-dependent and Time-independent Directional Search for High-Energy Astrophysical Neutrino Point Sources in Super-Kamiokande

Conference Proceedings of Science · September 27, 2024 This contribution reports the results of the searches for high-energy astrophysical neutrino point sources in the energy range above GeV using Super-Kamiokande data. The searches include time-integrated and time-dependent full sky searches for both νμ ... Cite

Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment

Conference Proceedings of Science · September 27, 2024 Super-Kamiokande (SK) experiment started the "SK-Gd experiment" by dissolving gadolinium (Gd) sulfate octa-hydrate in ultra-pure water from the tank in July 2020. The neutron tagging efficiency has been improved compared to the pure-water phase by detectin ... Cite

Measurement of the charge ratio and polarization of cosmic-ray muon using the tagged decay-e events in Super-Kamiokande

Conference Proceedings of Science · September 27, 2024 Neutrinos and muons from cosmic-ray interactions in the atmosphere originate from mesons, such as pions and kaons, in air-showers. An accuracy of the absolute atmospheric neutrino flux and its flavor ratio are limited due to the uncertainty of meson produc ... Cite

Status and Prospect of SK-Gd Project

Conference Proceedings of Science · September 27, 2024 In 2020, a new phase of Super-Kamiokande experiment, SK-Gd, was started by loading gadolinium into the pure water. This led to a high neutron detection efficiency, which allows us to distinguish different neutrino reactions, enhance signals and remove back ... Cite

Study of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment

Conference Proceedings of Science · September 27, 2024 The atmospheric neutrino-oxygen neutral-current quasielasatic (NCQE) reactions are one of the main background in the search for supernova relic neutrinos. Here, we report the first measurement of the atmospheric neutrino-oxygen NCQE cross section in the Su ... Cite

Measurement of the kaon to pion production ratio with the Super-Kamiokande

Conference Proceedings of Science · September 27, 2024 Cosmic-ray muons are generated from the decay of mesons which are secondary particles produced via hadronic interaction between primary cosmic-ray particles and atmospheric nuclei at the upper the atmosphere. The mesons such pions and kaons mostly decay in ... Cite

Measurement of cosmogenic 9Li in Super-Kamiokande with gadolinium loaded water

Conference Proceedings of Science · September 27, 2024 Super-Kamiokande is a large water Cherenkov detector located approximately 1,000 m underground in Kamioka, Japan. The detector is a cylindrical tank 39.3 m in diameter and 41.4 m high, filled with about 50 kton of gadolinium loaded water. We measured ... Cite

First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment

Conference Proceedings of Science · September 27, 2024 Since 2020, Super-Kamiokande (SK) detector has been updated by loading gadolinium (Gd) as a new experimental phase, ‘SK-Gd.’ In the SK-Gd experiment, we can search low-energy electron antineutrinos via inverse-beta decay with efficient neutron identificati ... Cite

Search for Boosted Dark Matter in Super-Kamiokande with low-energy electrons

Conference Proceedings of Science · September 27, 2024 Despite efforts from numerous experiments to grasp the nature of dark matter, no convincing dark matter signal has been observed so far and the very properties of this invisible matter remain unknown. Nevertheless, strong constraints on these properties ar ... Cite

Second gadolinium loading to Super-Kamiokande

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · August 1, 2024 The first loading of gadolinium (Gd) into Super-Kamiokande in 2020 was successful, and the neutron capture efficiency on Gd reached 50%. To further increase the Gd neutron capture efficiency to 75%, 26.1 tons of Gd2(SO4)3⋅8 ... Full text Cite

New methods and simulations for cosmogenic induced spallation removal in Super-Kamiokande-IV

Journal Article Physical Review D · August 1, 2024 Radioactivity induced by cosmic muon spallation is a dominant source of backgrounds for O(10 MeV) neutrino interactions in water Cherenkov detectors. In particular, it is crucial to reduce backgrounds to measure the solar neutrino spectrum and find neutrin ... Full text Cite

Review of particle physics

Journal Article Physical Review D · August 1, 2024 The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements from 869 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, lepton ... Full text Cite

Performance of SK-Gd’s Upgraded Real-time Supernova Monitoring System

Journal Article Astrophysical Journal · July 1, 2024 Among multimessenger observations of the next Galactic core-collapse supernova, Super-Kamiokande (SK) plays a critical role in detecting the emitted supernova neutrinos, determining the direction to the supernova (SN), and notifying the astronomical commun ... Full text Cite

Search for Periodic Time Variations of the Solar ^{8}B Neutrino Flux between 1996 and 2018 in Super-Kamiokande.

Journal Article Physical review letters · June 2024 We report a search for time variations of the solar ^{8}B neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino interaction over 22 ca ... Full text Cite

Solar neutrino measurements using the full data period of Super-Kamiokande-IV

Journal Article Physical Review D · May 1, 2024 An analysis of solar neutrino data from the fourth phase of Super-Kamiokande (SK-IV) from October 2008 to May 2018 is performed and the results are presented. The observation time of the dataset of SK-IV corresponds to 2970 days and the total live time for ... Full text Cite

Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I-V

Journal Article Physical Review D · April 1, 2024 We present a measurement of neutrino oscillation parameters with the Super-Kamiokande detector using atmospheric neutrinos from the complete pure-water SK I-V (April 1996-July 2020) dataset, including events from an expanded fiducial volume. The dataset co ... Full text Cite

Simulating image coaddition with the Nancy Grace Roman Space Telescope - II. Analysis of the simulated images and implications for weak lensing

Journal Article Monthly Notices of the Royal Astronomical Society · March 1, 2024 One challenge for applying current weak lensing analysis tools to the Nancy Grace Roman Space Telescope is that individual images will be undersampled. Our companion paper presented an initial application of IMCOM - an algorithm that builds an optimal mapp ... Full text Cite

Galaxy bias in the era of LSST: perturbative bias expansions

Journal Article Journal of Cosmology and Astroparticle Physics · February 1, 2024 Upcoming imaging surveys will allow for high signal-to-noise measurements of galaxy clustering at small scales. In this work, we present the results of the Rubin Observatory Legacy Survey of Space and Time (LSST) bias challenge, the goal of which is to com ... Full text Cite

Simulating image coaddition with the Nancy Grace Roman Space Telescope – I. Simulation methodology and general results

Journal Article Monthly Notices of the Royal Astronomical Society · February 1, 2024 The upcoming Nancy Grace Roman Space Telescope will carry out a wide-area survey in the near-infrared. A key science objective is the measurement of cosmic structure via weak gravitational lensing. Roman data will be undersampled, which introduces new chal ... Full text Cite

Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment

Journal Article Physical Review D · January 1, 2024 We report the first measurement of the atmospheric neutrino-oxygen neutral-current quasielastic (NCQE) cross section in the gadolinium-loaded Super-Kamiokande (SK) water Cherenkov detector. In June 2020, SK began a new experimental phase, named SK-Gd, by l ... Full text Cite

Rubin Observatory Simonyi Survey Telescope integrated mount performance

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 The Vera C. Rubin Observatory is an integrated survey system, currently under construction in Chile, to accomplish a 10-year optical survey of the southern sky. The 8.4-meter Simonyi Survey Telescope mount is nearing completion and undergoing final verific ... Full text Cite

Image Quality Estimation: Pathfinding for the Vera C. Rubin Observatory

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 The Vera C. Rubin Observatory is nearing completion, and we are embarking on a campaign to optimize the image quality during its upcoming 10-year optical survey. Here, we present the tools and methods we are implementing to disentangle and quantify the dif ... Full text Cite

Erratum: Search for Cosmic-Ray Boosted Sub-GeV Dark Matter Using Recoil Protons at Super-Kamiokande [Phys. Rev. Lett. 130, 031802 (2023)].

Journal Article Physical review letters · October 2023 This corrects the article DOI: 10.1103/PhysRevLett.130.031802. ... Full text Cite

Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water

Journal Article Astrophysical Journal Letters · July 1, 2023 We report the first search result for the flux of astrophysical electron antineutrinos for energies(10)MeV in the gadolinium-loaded Super-Kamiokande (SK) detector. In 2020 June, gadolinium was introduced to the ultrapure water of the SK detector in order t ... Full text Cite

A joint Roman Space Telescope and Rubin Observatory synthetic wide-field imaging survey

Journal Article Monthly Notices of the Royal Astronomical Society · June 1, 2023 We present and validate 20 deg2 of overlapping synthetic imaging surveys representing the full depth of the Nancy Grace Roman Space Telescope High-Latitude Imaging Survey (HLIS) and 5 yr of observations of the Vera C. Rubin Observatory Legacy Su ... Full text Cite

Measurement of the cosmogenic neutron yield in Super-Kamiokande with gadolinium loaded water

Journal Article Physical Review D · May 1, 2023 Cosmic-ray muons that enter the Super-Kamiokande detector cause hadronic showers due to spallation in water, producing neutrons and radioactive isotopes. These are a major background source for studies of MeV-scale neutrinos and searches for rare events. I ... Full text Cite

A unified catalogue-level reanalysis of stage-III cosmic shear surveys

Journal Article Monthly Notices of the Royal Astronomical Society · April 1, 2023 Cosmological parameter constraints from recent galaxy imaging surveys are reaching percent-level accuracy on the effective amplitude of the lensing signal, S8. The upcoming Legacy Survey of Space and Time (LSST) of the Vera C. Rubin Observatory ... Full text Cite

Fringing Analysis and Simulation for the Vera C. Rubin Observatory’s Legacy Survey of Space and Time

Journal Article Publications of the Astronomical Society of the Pacific · March 1, 2023 The presence of fringing in astronomical Charge-Coupled Device (CCD) images will have an impact on photometric quality and measurements. Yet its impact on the Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) has not been fully studied. We ... Full text Cite

Search for Cosmic-Ray Boosted Sub-GeV Dark Matter Using Recoil Protons at Super-Kamiokande.

Journal Article Physical review letters · January 2023 We report a search for cosmic-ray boosted dark matter with protons using the 0.37  megaton×years data collected at Super-Kamiokande experiment during the 1996-2018 period (SKI-IV phase). We searched for an excess of proton recoils above the atmospheric neu ... Full text Cite

Searching for Supernova Bursts in Super-Kamiokande IV

Journal Article Astrophysical Journal · October 1, 2022 Super-Kamiokande has been searching for neutrino bursts characteristic of core-collapse supernovae continuously, in real time, since the start of operations in 1996. The present work focuses on detecting more distant supernovae whose event rate may be too ... Full text Cite

Neutron tagging following atmospheric neutrino events in a water Cherenkov detector

Journal Article Journal of Instrumentation · October 1, 2022 We present the development of neutron-tagging techniques in Super-Kamiokande IV using a neural network analysis. The detection efficiency of neutron capture on hydrogen is estimated to be 26%, with a mis-tag rate of 0.016 per neutrino event. The uncertaint ... Full text Cite

Search for proton decay via p →μ+K0 in 0.37 megaton-years exposure of Super-Kamiokande

Journal Article Physical Review D · October 1, 2022 We searched for proton decay via p→μ+K0 in 0.37 Mton·years of data collected between 1996 and 2018 from the Super-Kamiokande water Cherenkov experiment. The selection criteria were defined separately for KS0 and KL0 channels. No significant event excess ha ... Full text Cite

SNIa Cosmology Analysis Results from Simulated LSST Images: From Difference Imaging to Constraints on Dark Energy

Journal Article Astrophysical Journal · August 1, 2022 The Vera Rubin Observatory Legacy Survey of Space and Time (LSST) is expected to process ∼106 transient detections per night. For precision measurements of cosmological parameters and rates, it is critical to understand the detection efficiency, ... Full text Cite

Pre-supernova Alert System for Super-Kamiokande

Journal Article Astrophysical Journal · August 1, 2022 In 2020, the Super-Kamiokande (SK) experiment moved to a new stage (SK-Gd) in which gadolinium (Gd) sulfate octahydrate was added to the water in the detector, enhancing the efficiency to detect thermal neutrons and consequently improving the sensitivity t ... Full text Cite

Review of Particle Physics

Journal Article Progress of Theoretical and Experimental Physics · August 1, 2022 The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, lepton ... Full text Cite

Search for solar electron anti-neutrinos due to spin-flavor precession in the Sun with Super-Kamiokande-IV

Journal Article Astroparticle Physics · June 1, 2022 Due to a very low production rate of electron anti-neutrinos (ν̄e) via nuclear fusion in the Sun, a flux of solar ν̄e is unexpected. An appearance of ν̄e in solar neutrino flux opens a new window for the new physics beyond the ... Full text Cite

Follow-up of GWTC-2 gravitational wave events with neutrinos from the Super-Kamiokande detector

Conference Proceedings of Science · March 18, 2022 Super-Kamiokande (SK) is a 50-kt water Cherenkov detector, instrumented with ∼ 13k photo-multipliers and running since 1996. It is sensitive to neutrinos with energies ranging from 4.5 MeV to several TeV. A new framework has been developed for the follow-u ... Cite

Low energy radioactivity BG model in Super-Kamiokande detector from SK-IV data

Conference Proceedings of Science · March 18, 2022 The radioactivity background are among the most dangerous background for low energy neutrino analysis in Super-Kamiokande (SK), like the solar neutrino analysis. Among them, the main contribution is coming from 222Rn, which is spread in the dete ... Cite

Diffuse Supernova Neutrino Background search at Super-Kamiokande with neutron tagging

Conference Proceedings of Science · March 18, 2022 Detecting the Diffuse Supernova Neutrino Background at Super-Kamiokande requires designing state-of-the-art background removal technique to reject radioactivity induced by cosmic muon spallation, and identify atmospheric neutrino interactions. Identifying ... Cite

Diffuse Supernova Neutrino Background Search at Super-Kamiokande

Conference Proceedings of Science · March 18, 2022 We present the results of a search for the Diffuse Supernova Neutrino Background (DSNB) at Super-Kamiokande (SK) that incorporates 22.5 × 2970 kton.days of data from its fourth data-taking phase. Two analyses, with different energy regimes covering the 9.3 ... Cite

First gadolinium loading to Super-Kamiokande

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · March 11, 2022 In order to improve Super-Kamiokande's neutron detection efficiency and to thereby increase its sensitivity to the diffuse supernova neutrino background flux, 13 tons of Gd2(SO4)3⋅8H2O (gadolinium sulfate octahyd ... Full text Cite

Rubin observatory commissioning camera: summit integration

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 The Rubin Observatory Commissioning Camera (ComCam) is a scaled down (144 Megapixel) version of the 3.2 Gigapixel LSSTCam which will start the Legacy Survey of Space and Time (LSST), currently scheduled to start in 2024. The purpose of the ComCam is to ver ... Full text Cite

Diffuse supernova neutrino background search at Super-Kamiokande

Journal Article Physical Review D · December 15, 2021 We have conducted a new search for the diffuse supernova neutrino background (DSNB) flux at Super-Kamiokande (SK), with a 22.5×2970-kton·day exposure from its fourth operational phase IV. With the new analysis we improve on the existing background reductio ... Full text Cite

SNIa-Cosmology Analysis Results from Simulated LSST Images: from Difference Imaging to Constraints on Dark Energy

Journal Article · December 1, 2021 The Vera Rubin Observatory Legacy Survey of Space and Time (LSST) is expected to process ${\sim}10^6$ transient detections per night. For precision measurements of cosmological parameters and rates, it is critical to understand the detection efficiency, ma ... Open Access Link to item Cite

New Methods and Simulations for Cosmogenic Induced Spallation Removal in Super-Kamiokande-IV

Journal Article · November 30, 2021 Radioactivity induced by cosmic muon spallation is a dominant source of backgrounds for $\mathcal{O}(10)~$MeV neutrino interactions in water Cherenkov detectors. In particular, it is crucial to reduce backgrounds to measure the solar neutrino spectrum and ... Link to item Cite

Search for tens of MeV neutrinos associated with gamma-ray bursts in Super-Kamiokande

Journal Article Progress of Theoretical and Experimental Physics · October 1, 2021 A search for neutrinos produced in coincidence with gamma-ray bursts (GRBs) was conducted with the Super-Kamiokande (SK) detector. Between December 2008 and March 2017, the Gamma-ray Coordinates Network recorded 2208 GRBs that occurred during normal SK ope ... Full text Cite

Search for neutrinos in coincidence with gravitational wave events from the LIGO–Virgo O3a observing run with the Super-Kamiokande detector

Journal Article Astrophysical Journal · September 10, 2021 The Super-Kamiokande detector can be used to search for neutrinos in time coincidence with gravitational waves detected by the LIGO–Virgo Collaboration (LVC). Both low-energy (7–100 MeV) and high-energy (0.1–105 GeV) samples were analyzed in ord ... Full text Cite

The LSST DESC DC2 simulated sky survey

Journal Article Astrophysical Journal Supplement Series · March 12, 2021 Featured Publication We describe the simulated sky survey underlying the second data challenge (DC2) carried out in preparation for analysis of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) by the LSST Dark Energy Science Collaboration (LSST DESC). Signi ... Full text Cite

Neutron-antineutron oscillation search using a 0.37 megaton-years exposure of Super-Kamiokande

Journal Article Physical Review D · January 21, 2021 As a baryon number violating process with ΔB=2, neutron-antineutron oscillation (n→n¯) provides a unique test of baryon number conservation. We have performed a search for n→n¯ oscillation with bound neutrons in Super-Kamiokande, with the full dataset from ... Full text Cite

DESC DC2 Data Release Note

Journal Article · January 12, 2021 In preparation for cosmological analyses of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), the LSST Dark Energy Science Collaboration (LSST DESC) has created a 300 deg$^2$ simulated survey as part of an effort called Data Challenge 2 ... Link to item Cite

Search for solar electron anti-neutrinos due to spin-flavor precession in the Sun with Super-Kamiokande-IV

Journal Article · December 14, 2020 Due to a very low production rate of electron anti-neutrinos ($\bar{\nu}_e$) via nuclear fusion in the Sun, we expect to see $\bar{\nu}_e$ from other contribution. An appearance of $\bar{\nu}_e$ in solar neutrino flux opens a new window for the new physics ... Link to item Cite

Search for Proton Decay via $p\to e^+π^0$ and $p\to μ^+π^0$ with an Enlarged Fiducial Volume in Super-Kamiokande I-IV

Journal Article · October 30, 2020 We have searched for proton decay via $p\to e^+\pi^0$ and $p\to \mu^+\pi^0$ modes with the enlarged fiducial volume data of Super-Kamiokande from April 1996 to May 2018, which corresponds to 450 kton$\cdot$years exposure. We have accumulated about 25% more ... Link to item Cite

Recommended Target Fields for Commissioning the Vera C. Rubin Observatory

Journal Article · October 29, 2020 The commissioning team for the Vera C. Rubin observatory is planning a set of engineering and science verification observations with the Legacy Survey of Space and Time (LSST) commissioning camera and then the Rubin Observatory LSST Camera. The time frame ... Link to item Cite

Indirect search for dark matter from the Galactic Center and halo with the Super-Kamiokande detector

Journal Article Physical Review D · October 9, 2020 We present a search for an excess of neutrino interactions due to dark matter in the form of weakly interacting massive particles (WIMPs) annihilating in the Galactic center or halo based on the data set of Super-Kamiokande-I, -II, -III and -IV taken from ... Full text Cite

The LSST DESC data challenge 1: Generation and analysis of synthetic images for next-generation surveys

Journal Article Monthly Notices of the Royal Astronomical Society · September 1, 2020 Featured Publication Data Challenge 1 (DC1) is the first synthetic data set produced by the Rubin Observatory Legacy Survey of Space and Time (LSST) Dark Energy Science Collaboration (DESC). DC1 is designed to develop and validate data reduction and analysis and to study the i ... Full text Cite

Review of particle physics

Journal Article Progress of Theoretical and Experimental Physics · January 1, 2020 The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,324 new measurements from 878 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, lepton ... Full text Cite

Dark Matter Science in the Era of LSST

Journal Article \baas · May 2019 Cite

Probing the Fundamental Nature of Dark Matter with the Large Synoptic Survey Telescope

Journal Article · April 24, 2019 Astrophysical and cosmological observations currently provide the only robust, empirical measurements of dark matter. Future observations with Large Synoptic Survey Telescope (LSST) will provide necessary guidance for the experimental dark matter program. ... Link to item Cite

Dark Energy and Modified Gravity

Journal Article · March 28, 2019 Despite two decades of tremendous experimental and theoretical progress, the riddle of the accelerated expansion of the Universe remains to be solved. On the experimental side, our understanding of the possibilities and limitations of the major dark energy ... Link to item Cite

LSST: From Science Drivers to Reference Design and Anticipated Data Products

Journal Article Astrophysical Journal · March 10, 2019 We describe here the most ambitious survey currently planned in the optical, the Large Synoptic Survey Telescope (LSST). The LSST design is driven by four main science themes: probing dark energy and dark matter, taking an inventory of the solar system, ex ... Full text Cite

T2K ND280 Upgrade -- Technical Design Report

Journal Article · January 11, 2019 In this document, we present the Technical Design Report of the Upgrade of the T2K Near Detector ND280. The goal of this upgrade is to improve the Near Detector performance to measure the neutrino interaction rate and to constrain the neutrino interaction ... Link to item Cite

LSST Target of Opportunity proposal for locating a core collapse supernova in our galaxy triggered by a neutrino supernova alert

Journal Article · January 6, 2019 A few times a century, a core collapse supernova (CCSN) occurs in our galaxy. When such galactic CCSNe happen, over 99\% of its gravitational binding energy is released in the form of neutrinos. Over a period of tens of seconds, a powerful neutrino flux is ... Link to item Cite

Physics potentials with the second Hyper-Kamiokande detector in Korea

Journal Article Progress of Theoretical and Experimental Physics · June 1, 2018 Full text Cite

Review of Particle Physics

Journal Article Phys. Rev. · 2018 Full text Cite

First measurement of the muon neutrino charged current single pion production cross section on water with the T2K near detector

Journal Article Physical Review D · January 26, 2017 The T2K off-axis near detector, ND280, is used to make the first differential cross section measurements of muon neutrino charged current single positive pion production on a water target at energies ∼0.8 GeV. The differential measurements are presented as ... Full text Cite

Commissioning of the Cold Test Facility for the JT-60SA Tokamak Toroidal Field Coils

Journal Article IEEE Transactions on Applied Superconductivity · June 1, 2016 JT-60SA is a fusion experiment, which is jointly constructed by Japan and Europe and which shall contribute to the early realization of fusion energy, by providing support to the operation of ITER and by addressing key physics issues for ITER and DEMO. The ... Full text Cite

High fidelity point-spread function retrieval in the presence of electrostatic, hysteretic pixel response

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2016 We employ electrostatic conversion drift calculations to match CCD pixel signal covariances observed in at field exposures acquired using candidate sensor devices for the LSST Camera.1, 2 We thus constrain pixel geometry distortions present at t ... Full text Cite

Review of Particle Physics

Journal Article Chin. Phys. · 2016 Full text Cite

The brighter-fatter and other sensor effects in CCD simulations for precision astronomy

Journal Article Journal of Instrumentation · May 1, 2015 Upcoming and current large astronomical survey experiments often seek to constrain cosmological parameters via measurements of subtle effects such as weak lensing, which can only be measured statistically. In these cases, instrumental effects in the image ... Full text Cite

Search for n-n ¯ oscillation in Super-Kamiokande SEARCH FOR n-n ¯ OSCILLATION IN SUPER-⋯ K. ABE et al.

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · April 10, 2015 A search for neutron-antineutron (n-n¯) oscillation was undertaken in Super-Kamiokande using the 1489 live-day or 2.45×1034 neutron-year exposure data. This process violates both baryon and baryon minus lepton numbers by an absolute value of two units and ... Full text Cite

Search for dinucleon decay into pions at Super-Kamiokande

Journal Article Physical Review D - Particles, Fields, Gravitation and Cosmology · 2015 © 2015 American Physical Society.A search for dinucleon decay into pions with the Super-Kamiokande detector has been performed with an exposure of 282.1 kiloton-years. Dinucleon decay is a process that violates baryon number by two units. We present the fi ... Full text Cite

Search for nucleon decay via n→ν[over ¯]π0 and p→ν[over ¯]π+ in Super-Kamiokande.

Journal Article Physical review letters · September 2014 We present the results of searches for nucleon decay via n→ν[over ¯]π0 and p→ν[over ¯]π+ using data from a combined 172.8  kt·yr exposure of Super-Kamiokande-I,-II, and-III. We set lower limits on the partial lifetime for each of these modes: τn→ν[over ¯]π ... Full text Cite

Recent Results from the T2K Experiment

Journal Article Nucl. Phys. Proc. Suppl. · 2014 Full text Cite

Review of Particle Physics

Journal Article Chin. Phys. · 2014 Full text Cite

Calibration of the Super-Kamiokande Detector

Journal Article Nucl. Instrum. Meth. · 2014 Full text Cite

Neutrinos

Journal Article · October 16, 2013 This document represents the response of the Intensity Frontier Neutrino Working Group to the Snowmass charge. We summarize the current status of neutrino physics and identify many exciting future opportunities for studying the properties of neutrinos and ... Link to item Cite

Evidence of electron neutrino appearance in a muon neutrino beam

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · August 5, 2013 The T2K Collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, |Δm322|≈2.4×10-3 eV2. An excess of electron neutrino interactions over background is observed from a muon neutrino beam with a peak energy ... Full text Cite

Measurement of the inclusive νμ charged current cross section on carbon in the near detector of the T2K experiment

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · May 7, 2013 T2K has performed the first measurement of νμ inclusive charged current interactions on carbon at neutrino energies of ∼1 GeV where the measurement is reported as a flux-averaged double differential cross section in muon momentum and angle. The ... Full text Cite

Evidence for the appearance of atmospheric tau neutrinos in super-Kamiokande.

Journal Article Physical review letters · May 2013 Super-Kamiokande atmospheric neutrino data were fit with an unbinned maximum likelihood method to search for the appearance of tau leptons resulting from the interactions of oscillation-generated tau neutrinos in the detector. Relative to the expectation o ... Full text Cite

Publisher's Note: T2K neutrino flux prediction

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 29, 2013 Full text Cite

T2K neutrino flux prediction

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 2, 2013 The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an off-axis muon neutrino beam with a peak energy of about 0.6 GeV that originates at the Japan Proton Accelerator Research Complex accelerator facility. Interactions of the neutrino ... Full text Cite

Hyper-Kamiokande Physics Opportunities

Journal Article Proceedings, 2013 Community Summer Study on the Future of U.S. Particle Physics: Snowmass on the Mississippi (CSS2013): Minneapolis, MN, USA, July 29-August 6, 2013 · 2013 Cite

Search for light WIMP captured in the Sun using contained events in Super-Kamiokande

Conference Proceedings of the 33rd International Cosmic Rays Conference Icrc 2013 · January 1, 2013 Super-Kamiokande can search for dark matter by detecting neutrinos and muons which are produced by WIMP pair annihilations occur inside the Sun. The huge gravity and hydrogen-rich composition of the Sun combined with high sensitivity of Super-Kamiokande fo ... Cite

The Long-Baseline Neutrino Experiment: Exploring Fundamental Symmetries of the Universe

Journal Article Snowmass 2013: Workshop on Energy Frontier Seattle, USA, June 30-July 3, 2013 · 2013 Cite

Search for GUT monopoles at Super-Kamiokande

Journal Article Astroparticle Physics · August 1, 2012 GUT monopoles captured by the Sun's gravitation are expected to catalyze proton decays via the Callan-Rubakov process. In this scenario, protons, which initially decay into pions, will ultimately produce νe, νμ and ν̄ μ. Aft ... Full text Cite

Search for proton decay via p→μ+K0 in Super-Kamiokande I, II, and III

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · July 23, 2012 We have searched for proton decay via p→μ +K0 using data from a 91.7kiloton•year exposure of Super-Kamiokande- I, a 49.2kiloton•year exposure of Super-Kamiokande II, and a 31.9kiloton•year exposure of Super-Kamiokande III. The number of candidat ... Full text Cite

Search for nucleon decay into charged antilepton plus meson in Super-Kamiokande i and II

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · June 5, 2012 Searches for a nucleon decay into a charged antilepton (e + or μ +) plus a light meson (π0, π -, η, ρ0, ρ -, ω) were performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes were searched fo ... Full text Cite

Supernova relic neutrino search at super-Kamiokande

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · March 22, 2012 A new Super-Kamiokande search for supernova relic neutrinos was conducted using 2853 live days of data. Sensitivity is now greatly improved compared to the 2003 Super-Kamiokande result, which placed a flux limit near many theoretical predictions. This more ... Full text Cite

Measurements of the T2K neutrino beam properties using the INGRID on-axis near detector

Journal Article Nucl.Instrum.Meth. · 2012 http://arxiv.org/abs/1111.3119 ... Full text Link to item Cite

First Muon-Neutrino Disappearance Study with an Off-Axis Beam

Journal Article Phys.Rev. · 2012 http://arxiv.org/abs/1201.1386 ... Full text Link to item Cite

Review of Particle Physics (RPP)

Journal Article Phys.Rev. · 2012 Full text Cite

Review of particle physics

Journal Article Physical Review D - Particles, Fields, Gravitation and Cosmology · 2012 This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2658 new measurements from 644 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We summarize ... Full text Cite

Study of nonstandard neutrino interactions with atmospheric neutrino data in Super-Kamiokande i and II

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · December 14, 2011 In this paper we study nonstandard neutrino interactions as an example of physics beyond the standard model using atmospheric neutrino data collected during the Super-Kamiokande I (1996-2001) and II (2003-2005) periods. We focus on flavor-changing-neutral- ... Full text Cite

Search for differences in oscillation parameters for atmospheric neutrinos and antineutrinos at Super-Kamiokande.

Journal Article Physical review letters · December 2011 We present a search for differences in the oscillations of antineutrinos and neutrinos in the Super-Kamiokande-I, -II, and -III atmospheric neutrino sample. Under a two-flavor disappearance model with separate mixing parameters between neutrinos and antine ... Full text Cite

An indirect search for weakly interacting massive particles in the sun using 3109.6days of upward-going muons in super-kamiokande

Journal Article Astrophysical Journal · December 1, 2011 We present the result of an indirect search for high energy neutrinos from Weakly Interacting Massive Particle (WIMP) annihilation in the Sun using upward-going muon (upmu) events at Super-Kamiokande. Data sets from SKI-SKIII (3109.6days) were used for the ... Full text Cite

Cross-section effects in the super-kamiokande tau appearance analysis

Journal Article Aip Conference Proceedings · December 1, 2011 In this talk, I explain the search for tau neutrino appearance in the atmospheric neutrino flux at Super-Kamiokande with a particular emphasis on the effect deep inelastic cross section uncertainties have on interpreting the result. In particular, I explai ... Full text Cite

Site testing for submillimetre astronomy at Dome C, Antarctica

Journal Article Astronomy and Astrophysics · November 25, 2011 Aims. Over the past few years a major effort has been put into the exploration of potential sites for the deployment of submillimetre astronomical facilities. Amongst the most important sites are Dome C and Dome A on the Antarctic Plateau, and the Chajnant ... Full text Cite

The 2010 Interim Report of the Long-Baseline Neutrino Experiment Collaboration Physics Working Groups

Journal Article · October 26, 2011 In early 2010, the Long-Baseline Neutrino Experiment (LBNE) science collaboration initiated a study to investigate the physics potential of the experiment with a broad set of different beam, near- and far-detector configurations. Nine initial topics were i ... Link to item Cite

Ten years of cryomagnetic W7-X test facility construction and operation

Journal Article Cryogenics · July 1, 2011 The construction, commissioning, and operation phases of the W7-X cryomagnetic test facility in CEA Saclay lasted ten years. The large diversity of equipments called, specialties involved and problems solved attest the expertise that was required to operat ... Full text Cite

Solar neutrino results in Super-Kamiokande-III

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · March 24, 2011 The results of the third phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first and second phase results. With improved detector calibrations, a full detector simulation, and improved analysis methods, the systemat ... Full text Cite

Measurement of inclusive π0 production in the charged-current interactions of neutrinos in a 1.3-GeV wide band beam

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · March 16, 2011 In this paper, we report on the measurement of the rate of inclusive π0 production induced by charged-current neutrino interactions in a C 8H8 target at a mean energy of 1.3 GeV in the K2K near detector. Out of a sample of 11606 charg ... Full text Cite

The T2K Experiment

Journal Article Nucl.Instrum.Meth. · 2011 http://arxiv.org/abs/1106.1238 ... Full text Link to item Cite

Atmospheric neutrino oscillation analysis with subleading effects in Super-Kamiokande I, II, and III

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · May 20, 2010 We present a search for nonzero θ13 and deviations of sin2θ23 from 0.5 in the oscillations of atmospheric neutrino data from Super-Kamiokande I, II, and III. No distortions of the neutrino flux consistent with nonzero θ13 are found and both neut ... Full text Open Access Cite

Experimentation of neutrino physics

Journal Article Tasi 2008 Proceedings of the 2008 Theoretical Advanced Study Institute in Elementary Particle Physics the Dawn of the Lhc Era · January 1, 2010 These lectures broadly describe experimental progress in neutrino physics over the past few decades. I will describe the basic picture, how we know what we now know, and the next steps for the future. Copyright © 2010 by World Scientific Publishing Co. Pte ... Full text Cite

Review of particle physics

Journal Article J. Phys. · 2010 Full text Cite

Working group I report (theory)

Journal Article Aip Conference Proceedings · January 1, 2010 The summary of the talks and discussions in Working Group I (Neutrino Oscillation Physics) at the NuFact08 workshop is presented here. © 2010 American Institute of Physics. ... Full text Cite

A Search for supernova relic neutrinos at Super-Kamiokande

Journal Article Journal of Physics: Conference Series · 2010 Supernova relic neutrinos (SRN) are the diffuse supernova neutrino background from all past supernovae. No experiment has succeeded in detecting SRN yet. Currently, the Super-Kamiokande experiment has the world's best flux upper limit of 1.2 e/cm2/sec for ... Full text Cite

The physics impact of proton track identification in future megaton-scale water Cherenkov detectors

Journal Article Journal of High Energy Physics · December 1, 2009 In this paper, we investigate the impact in future megaton-scale water Cherenkov detectors of identifying proton Cherenkov rings. We estimate the expected event rates for detected neutral current and charged current quasi-elastic neutrino interactions from ... Full text Cite

The path forward: Monte Carlo convergence discussion

Journal Article Aip Conference Proceedings · December 1, 2009 This is a summary of "the path forward" discussion session of the NuInt09 workshop which focused on Monte Carlo event generators. The main questions raised as part of this discussion are: how to make Monte Carlo generators more reliable and how important i ... Full text Cite

WG1 summary

Conference Proceedings of 10th International Workshop on Neutrino Factories, Super beams and Beta beams — PoS(Nufact08) · July 3, 2009 Full text Cite

Kinematic reconstruction of atmospheric neutrino events in a large water Cherenkov detector with proton identification

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · June 22, 2009 We report the development of a proton identification method for the Super-Kamiokande (SK) detector. This new tool is applied to the search for events with a single proton track, a high purity neutral current sample of interest for sterile neutrino searches ... Full text Cite

Search for proton decay via p-->e+pi0 and p-->micro+pi0 in a large water Cherenkov detector.

Journal Article Physical review letters · April 2009 We have searched for proton decays via p-->e;{+}pi;{0} and p-->micro;{+}pi;{0} using data from a 91.7 kt.yr exposure of Super-Kamiokande-I and a 49.2 kt.yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced ... Full text Cite

Search for neutrinos from GRB 080319B at super-kamiokande

Journal Article Astrophysical Journal · January 1, 2009 We perform a search for neutrinos coincident with GRB 080319B - the brightest GRB observed to date - in a 1000 s window. No statistically significant coincidences were observed and we thereby obtain an upper limit on the fluence of neutrino-induced muons f ... Full text Cite

Search for astrophysical neutrino point sources at super-kamiokande

Journal Article Astrophysical Journal · January 1, 2009 It has been hypothesized that large fluxes of neutrinos may be created in astrophysical "cosmic accelerators." The primary background for a search for astrophysical neutrinos comes from atmospheric neutrinos, which do not exhibit the pointlike directional ... Full text Cite

Summary of working group I: Theory

Journal Article 10th International Workshop on Neutrino Factories Super Beams and Beta Beams Nufact08 · December 1, 2008 We present the highlights of the parallel sessions of Working Group I at Nufact08. © owned by the author. ... Cite

Measurement of single charged pion production in the charged-current interactions of neutrinos in a 1.3GeV wide band beam

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · August 7, 2008 Single charged pion production in charged-current muon neutrino interactions with carbon is studied using data collected in the K2K long-baseline neutrino experiment. The mean energy of the incident muon neutrinos is 1.3 GeV. The data used in this analysis ... Full text Cite

Summary of working group one

Journal Article Aip Conference Proceedings · March 18, 2008 The theoretical and experimental issues discussed in working group one at Nufact07 are summarized. © 2008 American Institute of Physics. ... Full text Cite

Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · February 25, 2008 The atmospheric neutrino background for proton decay via p→e+π0 in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14×105 neutrino events corresponding to about 10 megaton-years ... Full text Cite

The super-kamiokande experiment

Chapter · January 1, 2008 Super-Kamiokande is a 50 kiloton water Cherenkov detector located at the Kamioka Observatory of the Institute for Cosmic Ray Research, University of Tokyo. It was designed to study neutrino oscillations and carry out searches for the decay of the nucleon. ... Full text Cite

Study of TeV Neutrinos with Upward Showering Muons in Super-Kamiokande

Journal Article Astropart. Phys. · 2008 http://arxiv.org/abs/0711.0053 ... Link to item Cite

Solar neutrino measurements in Super-Kamiokande-II

Journal Article Phys. Rev. · 2008 http://arxiv.org/abs/0803.4312 ... Link to item Cite

{First Study of Neutron Tagging with a Water Cherenkov Detector}

Journal Article Astroparticle Physics · 2008 http://arxiv.org/abs/0811.0735 ... Link to item Cite

Altered morphology of hippocampal dentate granule cell presynaptic and postsynaptic terminals following conditional deletion of TrkB.

Journal Article Hippocampus · 2008 Dentate granule cells play a critical role in the function of the entorhinal-hippocampal circuitry in health and disease. Dentate granule cells are situated to regulate the flow of information into the hippocampus, a structure required for normal learning ... Full text Link to item Cite

Why understanding neutrino interactions is important for oscillation physics

Journal Article Aip Conference Proceedings · December 1, 2007 Uncertainties in knowledge of neutrino interactions directly impact the ability measure the parameters of neutrino oscillation. Experiments which make use of differing technologies and neutrino beams are sensitive to different uncertainties. © 2007 America ... Full text Cite

GIVRE: A protection againt frost deposit on polar instruments

Journal Article Eas Publications Series · August 1, 2007 The CEA, in coordination with IPEV and LUAN, will prepare an experiment to study frost formation on surfaces in radiative cooling in the winter. This experiment has been shipped to be installed at Concordia before the 2007 winter period. It will be control ... Full text Cite

Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux with the Super-Kamiokande-I detector

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · March 23, 2007 The relative sidereal variation in the arrival direction of primary cosmic ray nuclei of median energy 10 TeV was measured using downward, through-going muons detected with the Super-Kamiokande-I detector. The projection of the anisotropy map onto the righ ... Full text Cite

Search for neutral Q-balls in Super-Kamiokande II

Journal Article Phys. Lett. B · 2007 http://arxiv.org/abs/hep-ex/0608057 ... Link to item Cite

Measurement of neutrino oscillation by the K2K experiment

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · October 20, 2006 We present measurements of νμ disappearance in K2K, the KEK to Kamioka long-baseline neutrino oscillation experiment. One-hundred and twelve beam-originated neutrino events are observed in the fiducial volume of Super-Kamiokande with an expectation of 158. ... Full text Cite

Measurement of the quasielastic axial vector mass in neutrino interactions on oxygen

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · September 20, 2006 The weak nucleon axial-vector form factor for quasielastic interactions is determined using neutrino interaction data from the K2K Scintillating Fiber detector in the neutrino beam at KEK. More than 12000 events are analyzed, of which half are charged-curr ... Full text Cite

Improved search for nu(mu) --> nu(e) oscillation in a long-baseline accelerator experiment.

Journal Article Physical review letters · May 2006 We performed an improved search for nu(mu) --> nu(e) oscillation with the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment, using the full data sample of 9.2 x 10(19) protons on target. No evidence for a nu(e) appearance signal was found, ... Full text Cite

Current status of solar neutrinos at super-kamiokande

Conference Annual Meeting of the Division of Particles and Fields of the American Physical Society, DPF 2006, and the Annual Fall Meeting of the Japan Particle Physics Community · 2006 • SK-III has been started and is taking data • SK-II data has been updated to its final 791d • Oscillation analysis with SK-I, SK-II data has been performed and shows consistency with final SK-I data set • SK-II shows consistency within the global analysis ... Cite

Current status of solar neutrinos at super-kamiokande

Conference Annual Meeting of the Division of Particles and Fields of the American Physical Society Dpf 2006 and the Annual Fall Meeting of the Japan Particle Physics Community · January 1, 2006 • SK-III has been started and is taking data • SK-II data has been updated to its final 791d • Oscillation analysis with SK-I, SK-II data has been performed and shows consistency with final SK-I data set • SK-II shows consistency within the global analysis ... Cite

Search for coherent charged pion production in neutrino carbon interactions

Journal Article Phys. Rev. Lett. · 2006 http://arxiv.org/pdf/hep-ex/0506008 ... Link to item Cite

A measurement of atmospheric neutrino flux consistent with tau neutrino appearance

Journal Article Phys. Rev. Lett. · 2006 http://arxiv.org/abs/hep-ex/0607059 ... Link to item Cite

High energy neutrino astronomy using upward-going muons in Super-Kamiokande-I

Journal Article Astrophys. J. · 2006 http://arxiv.org/abs/astro-ph/0606413 ... Link to item Cite

Three flavor neutrino oscillation analysis of atmospheric neutrinos in Super-Kamiokande

Journal Article Phys. Rev. · 2006 http://arxiv.org/abs/hep-ex/0604011 ... Link to item Cite

Measurements of atmospheric muon neutrino oscillations, global analysis of the data collected with MACRO detector

Journal Article European Physical Journal C · December 1, 2004 The final analysis of atmospheric neutrino events collected with the MACRO detector is presented. Three different classes of events, generated by neutrinos in different energy ranges, are studied looking at rates, angular distributions and estimated energi ... Full text Cite

Search for stellar gravitational collapses with the MACRO detector

Journal Article European Physical Journal C · October 1, 2004 We present the final results of the search for stellar gravitational collapses obtained by the MACRO experiment. The detector was active for a stellar collapse search for more than 11 years and it was sensitive to collapses occurring all over in our galaxy ... Full text Cite

Evidence for an oscillatory signature in atmospheric neutrino oscillations.

Journal Article Physical review letters · September 2004 Muon neutrino disappearance probability as a function of neutrino flight length L over neutrino energy E was studied. A dip in the L/E distribution was observed in the data, as predicted from the sinusoidal flavor transition probability of neutrino oscilla ... Full text Cite

Limits on the neutrino magnetic moment using 1496 days of Super-Kamiokande-I solar neutrino data.

Journal Article Physical review letters · July 2004 A search for a nonzero neutrino magnetic moment has been conducted using 1496 live days of solar neutrino data from Super-Kamiokande-I. Specifically, we searched for distortions to the energy spectrum of recoil electrons arising from magnetic scattering du ... Full text Cite

Search for electron neutrino appearance in a 250 km long-baseline experiment.

Journal Article Physical review letters · July 2004 We present a search for electron neutrino appearance from accelerator-produced muon neutrinos in the K2K long-baseline neutrino experiment. One candidate event is found in the data corresponding to an exposure of 4.8 x 10(19) protons on target. The expecte ... Full text Cite

Final Search for Lightly Ionizing Particles with the MACRO detector

Journal Article · February 2, 2004 We present the final results of a search for lightly ionizing particles using the entire cosmic ray data set the MACRO detector collected during its 1995-2000 run. Like the original search performed with the data of 1995-96, this search was sensitive to fr ... Link to item Cite

Low Energy Neutrino-Nucleus Interactions

Conference AIP Conference Proceedings · 2004 Full text Cite

The cosmic ray proton, helium and CNO fluxes in the 100 TeV energy region from TeV muons and EAS atmospheric Cherenkov light observations of MACRO and EAS-TOP

Journal Article Astroparticle Physics · January 1, 2004 The primary cosmic ray (CR) proton, helium and CNO fluxes in the energy range 80-300 TeV are studied at the National Gran Sasso Laboratories by means of EAS-TOP (Campo Imperatore, 2005 m a.s.l.) and MACRO (deep underground, 3100 m w.e., the surface energy ... Full text Cite

Precise measurement of the solar neutrino day-night and seasonal variation in Super-Kamiokande-I

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 1, 2004 The time variation of the elastic scattering rate of solar neutrinos with electrons in Super-Kamiokande-I was fit to the variations expected from active two-neutrino oscillations. The best fit in the large mixing angle solution has a mixing angle of [Formu ... Full text Cite

Search for dark matter WIMPs using upward through-going muons in Super-Kamiokande

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 1, 2004 We present the results of indirect searches for Weakly Interacting Massive Particles (WIMPs), with 1679.6 live days of data from the Super-Kamiokande detector using neutrino-induced upward through-going muons. The search is performed by looking for an exce ... Full text Cite

The cosmic ray primary composition between 1015 and 1016 eV from Extensive Air Showers electromagnetic and TeV muon data

Journal Article Astroparticle Physics · January 1, 2004 The cosmic ray primary composition in the energy range between 1015 and 1016 eV, i.e., around the "knee" of the primary spectrum, has been studied through the combined measurements of the EAS-TOP air shower array (2005 m a.s.l., 10 Full text Cite

Moon and Sun shadowing effect in the MACRO detector

Journal Article Astroparticle Physics · November 1, 2003 Using data collected by the MACRO experiment from 1989 to the end of its operations in 2000, we have studied in the underground muon flux the shadowing effects due to both the Moon and the Sun. We have observed the shadow cast by the Moon at its apparent p ... Full text Cite

Atmospheric neutrino oscillations from upward throughgoing muon multiple scattering in MACRO

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 24, 2003 The energy of atmospheric neutrinos detected by MACRO was estimated using multiple Coulomb scattering of upward throughgoing muons. This analysis allows a test of atmospheric neutrino oscillations, relying on the distortion of the muon energy distribution. ... Full text Cite

Measurement of the residual energy of muons in the Gran Sasso underground laboratories

Journal Article Astroparticle Physics · June 1, 2003 The MACRO detector was located in the Hall B of the Gran Sasso underground laboratories under an average rock overburden of 3700 hg/cm2. A transition radiation detector composed of three identical modules, covering a total horizontal area of 36 ... Full text Cite

Search for nu(e) from the sun at Super-Kamiokande-I.

Journal Article Physical review letters · May 2003 We present the results of a search for low energy nu(e) from the Sun using 1496 days of data from Super-Kamiokande-I. We observe no significant excess of events and set an upper limit for the conversion probability to nu(e) of the 8B solar neutrino. This c ... Full text Cite

Distinguishing νμ→ντ oscillations and exotic oscillation/decay hypotheses using Super-K atmospheric neutrino data

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · May 1, 2003 In this talk, I will review the Super-K analysis to distinguish between the νμ→ντ oscillation hypothesis and other exotic oscillation/decay scenarios. All of the tested exotic hypotheses are excluded by the Super-K atmospheric neutrin ... Full text Cite

The Super-Kamiokande detector

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · April 1, 2003 Super-Kamiokande is the world's largest water Cherenkov detector, with net mass 50,000 tons. During the period April, 1996 to July, 2001, Super-Kamiokande I collected 1678 live-days of data, observing neutrinos from the Sun, Earth's atmosphere, and the K2K ... Full text Cite

RECENT RESULTS FROM THE K2K EXPERIMENT

Conference Fundamental Interactions · February 2003 Full text Cite

Search for supernova relic neutrinos at Super-Kamiokande.

Journal Article Physical review letters · February 2003 A search for the relic neutrinos from all past core-collapse supernovae was conducted using 1496 days of data from the Super-Kamiokande detector. This analysis looked for electron-type antineutrinos that had produced a positron with an energy greater than ... Full text Cite

Tracking performance of the scintillating fiber detector in the K2K experiment

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · February 1, 2003 Tracking performance of the scintillating fiber detector (SciFi) in the K2K experiment was studied. SciFi was used to reconstruct charged particles produced in neutrino interactions in the near detector. The track reconstruction algorithm and the performan ... Full text Cite

Search for periodic modulations of the solar neutrino flux in Super-Kamiokande-I

Journal Article Physical Review D · January 1, 2003 A search for periodic modulations of the solar neutrino flux was performed using the Super-Kamiokande-I data taken from 31 May 1996 to 15 July 2001. The detector's capability of measuring the exact time of events, combined with a relatively high yield of s ... Full text Cite

Search for cosmic ray sources using muons detected by the MACRO experiment

Journal Article Astroparticle Physics · January 1, 2003 The MACRO underground detector at Gran Sasso Laboratory recorded 60 million secondary cosmic ray muons from February 1989 until December 2000. Different techniques were used to analyze this sample in search for density excesses from astrophysical point-lik ... Full text Cite

Search for diffuse neutrino flux from astrophysical sources with MACRO

Journal Article Astroparticle Physics · January 1, 2003 Many galactic and extragalactic astrophysical sources are currently considered promising candidates as high-energy neutrino emitters. Astrophysical neutrinos can be detected as upward-going muons produced in charged-current interactions with the medium sur ... Full text Cite

Search for the sidereal and solar diurnal modulations in the total MACRO muon data set

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 1, 2003 We have analyzed 44.3M single muons collected by MACRO from 1991 through 2000 in 2145 live days of operation. We have searched for the solar diurnal, apparent sidereal, and pseudosidereal modulation of the underground muon rate by computing hourly deviatio ... Full text Cite

Indications of neutrino oscillation in a 250 km long-baseline experiment.

Journal Article Physical review letters · January 2003 The K2K experiment observes indications of neutrino oscillation: a reduction of nu(mu) flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are observed in Super-Kamiokande (SK), 250 km from the neutrino production point, ... Full text Cite

Calibrations of CR39 and Makrofol nuclear track detectors and search for exotic particles

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 2003 We present the final results of the search for exotic massive particles in the cosmic radiation performed with the MACRO underground experiment. Magnetic monopoles and nuclearites flux upper limits obtained with the CR39 nuclear track subdetector, the scin ... Full text Cite

Indications of neutrino oscillation in a 250 km long-baseline experiment

Journal Article Physical Review Letters · 2003 A study was performed on Kamioka long-baseline neutrino oscillation experiment (K2K). The indications of neutrino oscillation such as a reduction of flux together with a distortion of the energy spectrum were observed in the experiment. In Super Kamiokande ... Cite

Recent results from the K2K experiment

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 2003 The K2K experiment has collected approximately half of its allocated protons on target between June of 1999 and July of 2001. These proceedings give a short introduction to the experiment and summarize some of the recent results. ... Full text Cite

Search for nucleon decays induced by GUT magnetic monopoles with the MACRO experiment

Journal Article European Physical Journal C · December 1, 2002 The interaction of a Grand Unification Magnetic Monopole with a nucleon can lead to a barion-number violating process in which the nucleon decays into a lepton and one or more mesons (catalysis of nucleon decay). In this paper we report an experimental stu ... Full text Cite

Final results of magnetic monopole searches with the MACRO experiment: The MACRO collaboration

Journal Article European Physical Journal C · November 1, 2002 We present the final results obtained by the MACRO experiment in the search for GUT magnetic monopoles in the penetrating cosmic radiation, for the range 4 × 10-5 < β < 1. Several searches with all the MACRO sub-detectors (i.e. scintillation cou ... Full text Cite

Muon energy estimate through multiple scattering with the MACRO detector

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · October 21, 2002 Muon energy measurement represents an important issue for any experiment addressing neutrino-induced up-going muon studies. Since the neutrino oscillation probability depends on the neutrino energy, a measurement of the muon energy adds an important piece ... Full text Cite

Search for neutrinos from gamma-ray bursts using Super-Kamiokande

Journal Article Astrophysical Journal · October 10, 2002 Using the Super-Kamiokande neutrino observatory, a search was conducted for neutrinos produced in coincidence with gamma-ray bursts observed by the Burst and Transient Source Experiment detector. Super-Kamiokande data in the neutrino energy range of 7 MeV ... Full text Cite

Letter of Intent to build an Off-axis Detector to study numu to nue oscillations with the NuMI Neutrino Beam

Journal Article · October 2, 2002 The NuMI neutrino beam line and the MINOS experiment represent a major investment of US High Energy Physics in the area of neutrino physics. The forthcoming results could decisively establish neutrino oscillations as the underlying physics mechanism for th ... Link to item Cite

Determination of solar neutrino oscillation parameters using 1496 days of Super-Kamiokande-I data

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 18, 2002 A number of different fits to solar neutrino mixing and mass square difference were performed using 1496 days of Super-Kamiokande-I's solar neutrino data. These data select two allowed areas at large neutrino mixing when combined with either the solar Full text Cite

A combined analysis technique for the search for fast magnetic monopoles with the MACRO detector

Journal Article Astroparticle Physics · July 8, 2002 We describe a search method for fast moving (β = v/c > 5 × 10-3) magnetic monopoles using simultaneously the scintillator, streamer tube and track-etch subdetectors of the MACRO apparatus. The first two subdetectors are used primarily for the id ... Full text Cite

Search for massive rare particles with MACRO

Journal Article Nuclear Physics B - Proceedings Supplements · July 2002 Full text Cite

The MACRO detector at Gran Sasso

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · July 1, 2002 MACRO was an experiment that ran in the Laboratori Nazionali del Gran Sasso from 1988 to 2000. Its principal goal was to observe magnetic monopoles or set significantly lower experimental flux limits than had been previously available in the velocity range ... Full text Cite

Status Report of the MACRO Experiment for the year 2001

Journal Article · June 12, 2002 In this 2001 status report of the MACRO experiment, results are presented on atmospheric neutrinos and neutrino oscillations, high energy neutrino astronomy, searches for WIMPs, search for low energy stellar gravitational collapse neutrinos, stringent uppe ... Link to item Cite

Quasi-elastic events and nuclear effects with the K2K Sci-Fi detector

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 2002 The near detector complex of the K2K long-baseline neutrino experiment contains a scintillating fiber tracking detector. It is capable of detecting not only the muon but also the outgoing proton in neutrino-nucleon scattering. This allows for the enhanceme ... Full text Cite

Nuclear Effects on QE Reconstruction in Low-Energy Neutrino Long-Baseline Experiments.

Journal Article Nuclear Physics B, Proceedings Supplements · 2002 Cite

Matter effects in upward-going muons and sterile neutrino oscillations

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 27, 2001 The angular distribution of upward-going muons produced by atmospheric neutrinos in the rock below the MACRO detector shows anomalies in good agreement with two flavor vμ → vτ oscillations with maximum mixing and Δm2 around ... Full text Cite

Detection of accelerator-produced neutrinos at a distance of 250 km

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 5, 2001 The KEK to Kamioka long-baseline neutrino experiment (K2K) has begun its investigation of neutrino oscillations suggested by atmospheric neutrino observations. Twenty-eight neutrino events have been detected in coincidence with the expected arrival time of ... Full text Cite

Solar 8B and hep neutrino measurements from 1258 days of Super-Kamiokande data.

Journal Article Physical review letters · June 2001 Solar neutrino measurements from 1258 days of data from the Super-Kamiokande detector are presented. The measurements are based on recoil electrons in the energy range 5.0-20.0 MeV. The measured solar neutrino flux is 2.32+/-0.03(stat)+0.08-0.07(syst)x10(6 ... Full text Cite

Constraints on neutrino oscillations using 1258 days of Super-Kamiokande solar neutrino data.

Journal Article Physical review letters · June 2001 We report the result of a search for neutrino oscillations using precise measurements of the recoil electron energy spectrum and zenith angle variations of the solar neutrino flux from 1258 days of neutrino-electron scattering data in Super-Kamiokande. The ... Full text Cite

Transgenic manipulation of the metabolism of polyamines in poplar cells.

Journal Article Plant physiology · April 2001 The metabolism of polyamines (putrescine, spermidine, and spermine) has become the target of genetic manipulation because of their significance in plant development and possibly stress tolerance. We studied the polyamine metabolism in non-transgenic (NT) a ... Full text Cite

N-16 as a calibration source for Super-Kamiokande

Journal Article NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT · February 11, 2001 Link to item Cite

Neutrino astronomy with the macro detector

Journal Article Astrophysical Journal · January 10, 2001 High-energy gamma-ray astronomy is now a well-established field, and several sources have been discovered in the region from a few giga-electron volts up to several tera-electron volts. If sources involving hadronic processes exist, the production of photo ... Full text Cite

16N as a calibration source for Super-Kamiokande

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · 2001 The decay of 16N is used to cross check the absolute energy scale calibration for solar neutrinos established by the electron linear accelerator (LINAC). A deuterium-tritium neutron generator was employed to create 16N via the (n,p) reaction on 16O in the ... Full text Cite

Search for lightly ionizing particles with the MACRO detector

Journal Article Physical Review D · December 1, 2000 A search for lightly ionizing particles has been performed with the MACRO detector. This search was sensitive to particles with charges between 1/5 e and close to the charge of an electron, with β between approximately 0.25 and 1.0. Unlike previous searche ... Cite

Tau neutrinos favored over sterile neutrinos in atmospheric muon neutrino oscillations.

Journal Article Physical review letters · November 2000 The previously published atmospheric neutrino data did not distinguish whether muon neutrinos were oscillating into tau neutrinos or sterile neutrinos, as both hypotheses fit the data. Using data recorded in 1100 live days of the Super-Kamiokande detector, ... Full text Cite

Design, construction, and operation of SciFi tracking detector for K2K experiment

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · October 11, 2000 We describe the construction and performance of a scintillating fiber detector used in the near detector for the K2K (KEK to Kamioka, KEK E362) long baseline neutrino oscillation experiment. The detector uses 3.7 m long and 0.692 mm diameter scintillating ... Full text Cite

Results from a new combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · July 21, 2000 A new combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. Th ... Full text Cite

Low energy atmospheric muon neutrinos in MACRO

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · April 6, 2000 We present the measurement of two event samples induced by atmospheric v(μ) of average energy Ē(ν) ~ 4 GeV. In the first sample, a neutrino interacts inside the MACRO detector producing an upward-going muon leaving the apparatus. The ratio of the number of ... Full text Cite

Nuclearite search with the MACRO detector at Gran Sasso

Journal Article The European Physical Journal C · April 2000 Full text Cite

Nuclearite search with the MACRO detector at Gran Sasso

Journal Article The European Physical Journal C · 2000 Full text Cite

Search for lightly ionizing particles with the MACRO detector

Journal Article Physical Review D - Particles, Fields, Gravitation and Cosmology · 2000 A search for lightly ionizing particles has been performed with the MACRO detector. This search was sensitive to particles with charges between 1/5 e and close to the charge of an electron, with β between approximately 0.25 and 1.0. Unlike previous searche ... Cite

Search for massive rare particles with the MACRO detector at Gran Sasso

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 2000 Searches for massive penetrating particles in the cosmic radiation have been performed with the MACRO detector. Scintillators, streamer tubes (instrumented with specialized electronics) and nuclear track detectors have been used to search for signatures co ... Full text Cite

Calibration of Super-Kamiokande using an electron LINAC

Journal Article Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · January 21, 1999 In order to calibrate the Super-Kamiokande experiment for solar neutrino measurements, a linear accelerator (LINAC) for electrons was installed at the detector. LINAC data were taken at various positions in the detector volume, tracking the detector respon ... Full text Cite

Experimental study of hadronic interaction models using coincident data from EAS-TOP and MACRO

Journal Article Nuclear Physics B - Proceedings Supplements · January 1999 Full text Cite

Study of photonuclear interaction of muons in rock with the MACRO experiment

Conference VULCANO WORKSHOP 1998 - FRONTIER OBJECTS IN ASTROPHYSICS AND PARTICLE PHYSICS · January 1, 1999 Link to item Cite

Relevance of the hadronic interaction model in the interpretation of multiple muon data as detected with the MACRO experiment

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 1999 With the aim of discussing the effect of the possible sources of systematic uncertainties in simulation models, the analysis of multiple muon events from the MACRO experiment at Gran Sasso is reviewed. In particular, the predictions from different currentl ... Full text Cite

Neutrino-induced upward stopping muons in Super-Kamiokande

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 1999 A total of 137 upward stopping muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 516 detector live days. The measured muon flux is 0.39 ± 0.04(stat.) ± 0.02(syst.) × 10-13 cm-2s-1sr-1 compar ... Full text Cite

Search for proton decay through p → ¯νK+ in a large water cherenkov detector

Journal Article Physical Review Letters · January 1, 1999 We present results of a search for proton decays, p → ¯νK+, using data from a 33kt?yr exposure of the Super-Kamiokande detector. Two decay modes of the kaon, K+ → µ+νµ and K+ → π+π0 Full text Cite

Constraints on neutrino oscillation parameters from the measurement of day-night solar neutrino fluxes at super-kamiokande

Journal Article Physical Review Letters · January 1, 1999 A search for day-night variations in the solar neutrino flux resulting from neutrino oscillations has been carried out using the 504 day sample of solar neutrino data obtained at Super-Kamiokande. The absence of a significant day-night variation has set an ... Full text Cite

Measurement of the solar neutrino energy spectrum using neutrino-electron scattering

Journal Article Physical Review Letters · January 1, 1999 A measurement of the energy spectrum of recoil electrons from solar neutrino scattering in the Super-Kamiokande detector is presented. The results shown here were obtained from 504 days of data taken between 31 May 1996 and 25 March 1998. The shape of the ... Full text Cite

Measurement of radon concentrations at Super-Kamiokande

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 1999 Radioactivity from radon is a major background for observing solar neutrinos at Super-Kamiokande. In this paper, we describe the measurement of radon concentrations at Super-Kamiokande, the method of radon reduction, and the radon monitoring system. The me ... Full text Cite

Measurement of the flux and zenith-angle distribution of upward throughgoing muons by super-kamiokande

Journal Article Physical Review Letters · January 1, 1999 A total of 614 upward throughgoing muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 537 detector live days. The measured muon flux is [1.74±0.07(stat)±0.02(sys)]×10-13cm-2s-1sr-1 compared t ... Full text Cite

Measurement of the energy spectrum of underground muons at Gran Sasso with a transition radiation detector

Journal Article Astroparticle Physics · January 1, 1999 We have measured directly the residual energy of cosmic ray muons crossing the MACRO detector at the Gran Sasso Laboratory. For this measurement we have used a transition radiation detector consisting of three identical modules, each of about 12m2 Full text Cite

Limits on dark matter WIMPs using upward-going muons in the MACRO detector

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 1, 1999 We perform an indirect search for weakly interacting massive particles (WIMPs) using the MACRO detector to look for neutrino-induced upward-going muons resulting from the annihilation of WIMPs trapped in the Sun and Earth. The search is conducted in variou ... Full text Cite

Observation of the East-West anisotropy of the atmospheric neutrino flux

Journal Article Physical Review Letters · January 1, 1999 The east-west anisotropy, caused by the deflection of primary cosmic rays in the Earth's magnetic field, is observed for the first time in the flux of atmospheric neutrinos. Using a 45 kt yr exposure of the Super-Kamiokande detector, 552 e-like and 633 μ-l ... Full text Cite

High statistics measurement of the underground muon pair separation at Gran Sasso

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 1, 1999 We present a measurement of the underground decoherence function using multi-muon events observed in the MACRO detector at Gran Sasso at an average depth of (Formula presented) Muon pair separations up to 70 m have been measured, corresponding to parent me ... Full text Cite

Observation of the shadowing of cosmic rays by the Moon using a deep underground detector

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 1, 1999 Using data collected by the MACRO experiment during the years 1989–1996, we show evidence for the shadow of the Moon in the underground cosmic ray flux with a significance of 3.6σ. This detection of the shadowing effect is the first by an underground detec ... Full text Cite

Study of the atmospheric neutrino flux in the multi-GeV energy range

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 17, 1998 The flavor ratio of the atmospheric neutrino flux and its zenith angle dependence have been studied in the multi-GeV energy range using an exposure of 25.5 kiloton-years of the Super-Kamiokande detector. By comparing the data to a detailed Monte Carlo simu ... Full text Cite

Measurement of the atmospheric neutrino-induced upgoing muon flux using MACRO

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 27, 1998 We present a measurement of the flux of neutrino-induced upgoing muons (< Eν > ∼ 100 GeV) using the MACRO detector. The ratio of the number of observed to expected events integrated over all zenith angles is 0.74 ± 0.036 (stat) ± 0.046 (systemat ... Full text Cite

Measurement of a small atmospheric νμ/νe ratio

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 6, 1998 From an exposure of 25.5 kiloton-years of the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum pe > 100 MeV/c, pμ > 200 MeV/c, and with visible en ... Full text Cite

Test beam results of a stereo preshower integrated in the liquid argon accordion calorimeter

Journal Article Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · July 1998 Full text Cite

Measurements of the solar neutrino flux from super-kamiokande’s first 300 days

Journal Article Physical Review Letters · January 1, 1998 The first results of the solar neutrino flux measurement from Super-Kamiokande are presented. The results shown here are obtained from data taken between 31 May 1996, and 23 June 1997. Using our measurement of recoil electrons with energies above 6.5 MeV, ... Full text Cite

Evidence for oscillation of atmospheric neutrinos

Journal Article Physical Review Letters · January 1, 1998 We present an analysis of atmospheric neutrino data from a 33.0 kton yr (535-day) exposure of the Super-Kamiokande detector. The data exhibit a zenith angle dependent deficit of muon neutrinos which is inconsistent with expectations based on calculations o ... Full text Cite

The observation of up-going charged particles produced by high energy muons in underground detectors

Journal Article Astroparticle Physics · January 1, 1998 An experimental study of the production of up-going charged particles in inelastic interactions of down-going underground muons is reported, using data obtained from the MACRO detector at the Gran Sasso Laboratory. In a sample of 12.2 x 106 sing ... Full text Cite

Real time supernova neutrino burst detection with MACRO

Journal Article Astroparticle Physics · January 1, 1998 The MACRO experiment has been running as a supernova neutrino detector since 1989 and is sensitive to the whole galaxy since the beginning of 1992. A galactic supernova would produce some hundreds of v̄e events in the detector. We describe our st ... Full text Cite

Search for proton decay via p→e+π0 in a large water cherenkov detector

Journal Article Physical Review Letters · January 1, 1998 We have searched for proton decay via p→e+π0 using data from a 25.5ktonyr exposure of the Super-Kamiokande detector. We find no candidate events with an expected background induced by atmospheric neutrinos of 0.1 events. From these da ... Full text Cite

Measurement of a small atmospheric νμ/νe ratio

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 1998 From an exposure of 25.5 kiloton-years of the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum pe > 100 MeV/c, pμ > 200 MeV/c, and with visible energy less than 1 ... Cite

Performance of the MACRO detector at Gran Sasso: Moon shadow and seasonal variations

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 1998 The MACRO underground detector at Gran Sasso has recorded about 30 million muon events in the period 1989-1995. We have analyzed these data to look for time variations and to study the pointing capabilities of the apparatus in the search for astrophysical ... Full text Cite

Magnetic monopole search with the MACRO detector at Gran Sasso

Journal Article Physics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 7, 1997 In this letter we present the results of the search for massive magnetic monopoles in the penetrating cosmic ray radiation using the various subdetectors of the MACRO apparatus, during the period 1989-1995. Flux limits are given for the β = v/c range 4 × 1 ... Full text Cite

High energy cosmic ray physics with the MACRO experiment at Gran Sasso

Journal Article Nuclear Physics B - Proceedings Supplements · February 1997 Full text Cite

Seasonal variations in the underground muon intensity as seen by MACRO

Journal Article Astroparticle Physics · January 1, 1997 Using 5.33 × 106 single muons collected in 1.46 × 104 live hours by MACRO during the period 1991-1994, we have searched for a correlation between variations in the underground muon rate, Νμ, and seasonal temperature variati ... Full text Cite

High energy cosmic ray physics with underground muons in MACRO. I. Analysis methods and experimental results

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 1, 1997 In this paper, the first of a two-part work, we present the reconstruction and measurement of muon events detected underground by the MACRO experiment at Gran Sasso [Formula presented] 1.3 TeV in atmosphere). The main aim of this work is to discuss the muo ... Full text Cite

High energy cosmic ray physics with underground muons in MACRO. II. Primary spectra and composition

Journal Article Physical Review D Particles Fields Gravitation and Cosmology · January 1, 1997 Multimuon data from the MACRO experiment at Gran Sasso have been analyzed using a new method, which allows one to estimate the primary cosmic ray fluxes. The estimated all-particle spectrum is higher and flatter than the one obtained from direct measuremen ... Full text Cite

Study of primary interactions with multiple muons in MACRO

Journal Article NUCLEAR PHYSICS B · 1996 Cite

Vertical muon intensity measured with MACRO at the Gran Sasso laboratory.

Journal Article Physical review. D, Particles and fields · October 1995 Full text Cite

Atmospheric neutrino flux measurement using upgoing muons

Journal Article Physics Letters B · September 7, 1995 We report on the first measurement of the flux of upgoing muons resulting from interactions of atmospheric neutrinos in the rock below MACRO. The ratio of the observed to the expected number of events integrated over all nadir angles is 0.73 ± .09stat ... Full text Cite

Performance of the MACRO streamer tube system in the search for magnetic monopoles

Journal Article Astroparticle Physics · January 1, 1995 We describe the techniques chosen to search tor magnetic monopoles using the MACRO streamer tube sub-system. The hardware and the details of the analysis procedures will be discussed also. The results for slowly moving monopoles are reported from a first d ... Full text Cite

Study of the primary cosmic ray composition around the knee of the energy spectrum

Journal Article Physics Letters B · October 13, 1994 A study of the primary cosmic ray composition in the energy range 5ṡ1014-5ṡ1015 eV is performed through the analysis of the deep underground muons and of the e.m. component of Extensive Air Showers detected in coincidence by the MACRO ... Full text Cite

Multiple Muon Measurements with MACRO

Journal Article · October 3, 1994 The MACRO experiment at Gran Sasso provides means for detailed studies of multiple coincident penetrating cosmic ray muons. In this paper we concentrate on the studies of the ultrahigh energy primary cosmic ray composition using muon bundle multiplicities, ... Link to item Cite

Study of the cosmic ray primary composition at E0 ∼ 1000 TeV by EAS-TOP and MACRO at Gran Sasso

Journal Article Nuclear Physics B - Proceedings Supplements · May 1994 Full text Cite

Muon astrophysics with the MACRO detector

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 1994 Muon events collected with the streamer tube system of MACRO have been used to study the vertical muon intensity and to search for astrophysical point sources. New upper limits on the muon fluxes coming from source candidates have been obtained. The μ pair ... Full text Cite

Search for slowly moving magnetic monopoles with the MACRO detector.

Journal Article Physical review letters · January 1994 Full text Cite

Muon astronomy with the MACRO detector

Journal Article The Astrophysical Journal · July 1993 Full text Cite

First supermodule of the MACRO detector at Gran Sasso

Journal Article Nuclear Inst and Methods in Physics Research A · January 1, 1993 In this paper the design, construction and performance of the lower part of the first supermodule of the MACRO detector is described. © 1993. ... Full text Cite

Measurement of the decoherence function with the MACRO detector at Gran Sasso.

Journal Article Physical review. D, Particles and fields · December 1992 Full text Cite

Search for nuclearites using the MACRO detector.

Journal Article Physical review letters · September 1992 Full text Cite

Study of the ultrahigh-energy primary-cosmic-ray composition with the MACRO experiment.

Journal Article Physical review. D, Particles and fields · August 1992 Full text Cite

Search of strange quark matter using MACRO detector

Journal Article Nuclear Physics B - Proceedings Supplements · July 1992 Full text Cite

Multiple muons and primary cosmic composition studies with MACRO

Conference Nuclear Physics B - Proceedings Supplements · July 1992 Full text Cite

Arrival time distributions of very high energy cosmic ray muons in MACRO

Journal Article Nuclear Physics Section B · February 17, 1992 We present a study of the correlations in the arrival times of about 1016 single and multiple muons detected by the first two MACRO supermodules. The time correlations, from milliseconds to several hundrends of seconds, have been analyzed in ter ... Full text Cite

Measurement of electromagnetic and TEV muon components of extensive air showers by eas-top and MACRO experiments

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 1992 The simultaneous observation of the electromagnetic and TeV muon components of extensive air showers by the EAS-TOP and MACRO detectors, respectively, is described for a period of 100 days in 1990. The two detectors and their combined resolutions are brief ... Full text Cite

Search for stellar gravitational collapse by MACRO: Characteristics and results

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 1992 The first MACRO lower supermodule has been sensitive to antineutrinos from stellar gravitational collapse since spring 1989. The results with the 44 tonnes of liquid scintillator which have been instrumented to search for stellar gravitational collapse are ... Full text Cite

Search for neutrino bursts from collapsing stars with the MACRO detector

Journal Article Astroparticle Physics · January 1, 1992 Full text Cite

Cosmic ray search for strange quark matter with the macro detector

Journal Article Nuclear Physics B Proceedings Supplements · January 1, 1991 The MACRO detector is sensitive to any fast or slow highly ionizing massive particles in cosmic rays. These include "nuclearites" or strange quark matter. The negative result of a search lasting about 20 months using 1 12 of the detector has yielded a flux ... Full text Cite